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  <title>Adding Multiple Documents</title>
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  <div id="layout-content"><div id="mongo.tutorial.insert.multiple" class="section">
   <h2 class="title">Adding Multiple Documents</h2>
   <p class="para">
    In order to do more interesting things with queries, let&#039;s add multiple
    simple documents to the collection. These documents will just be of the form
    <code class="literal">array( &quot;i&quot; =&gt; <span class="replaceable">value</span> );</code> and we
    can do this fairly efficiently in a loop:
   </p>
   <div class="example" id="mongo.tutorial.insert.multiple-example">
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$connection&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">MongoClient</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$collection&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$connection</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">database</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">collectionName</span><span style="color: #007700">;<br /><br />for&nbsp;(&nbsp;</span><span style="color: #0000BB">$i&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">;&nbsp;</span><span style="color: #0000BB">$i&nbsp;</span><span style="color: #007700">&lt;&nbsp;</span><span style="color: #0000BB">100</span><span style="color: #007700">;&nbsp;</span><span style="color: #0000BB">$i</span><span style="color: #007700">++&nbsp;)<br />{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$collection</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">insert</span><span style="color: #007700">(&nbsp;array(&nbsp;</span><span style="color: #DD0000">'i'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">$i</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"field</span><span style="color: #007700">{</span><span style="color: #0000BB">$i</span><span style="color: #007700">}</span><span style="color: #DD0000">"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">$i&nbsp;</span><span style="color: #007700">*&nbsp;</span><span style="color: #0000BB">2&nbsp;</span><span style="color: #007700">)&nbsp;);<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
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   <p class="para">
    Notice that we can insert arrays with different keys into the same
    collection. This aspect is what we mean when we say that MongoDB is
    &quot;schema-free&quot;. In the example above each document has an
    <code class="literal">i</code> field, but also a field name in the form of
    <code class="literal">field</code> + <code class="literal">$i</code>.
   </p>
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